Function nginx::inet6_opt_next

pub unsafe extern "C" fn inet6_opt_next(
    __extbuf: *mut c_void, 
    __extlen: socklen_t, 
    __offset: c_int, 
    __typep: *mut u8, 
    __lenp: *mut socklen_t, 
    __databufp: *mut *mut c_void
) -> c_int